Game mode: solo/co-op PC
Khitan Roofer unlocks at level 25
Requires Khitan Mason which unlocks at level 30
and Master Roofer which unlocks at level 35
Khitan Fence Maker unlocks at level 26
Requires Khitan Mason which still unlocks at level 30
and Master Fencer which unlocks at 36
Seems to me that the Khitan Roofer and the Fence Maker should unlock at 36 because the cannot be unlocked until that point for the requirements.